Forum Rules and Etiquette

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Guessing a Kaypro II model, again!

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    Guessing a Kaypro II model, again!

    I've recently purchased a Kaypro II (still not with me!) and I'm trying to wild guessing the machine specs.

    Most probably it's one of the original designs (2.5Mhz Z80), it has "Kaypro 2" silkscreened in the side and has the usual grey/blue case with black front. It also has full height drives.
    As I don't have any information about its motherboard or ROM I cannot guess anymore...

    There's one interesting detail about the ROM tho, the "Insert disk..." boot screen shows in the top left corner a message about "Advanced Technology Systems S.A.", does it has something to do with a third party ROM?

    Also, I've been trying to find some info about the Advent TurboBoard; but apart some pics, seems there's no info about details of how to build one?, does such info exists or no one has traced the board?

    This site:

    shows the Kaypro 2 with 4.0 MHz 81-294-n Motherboard & two double sided 390k floppy drives
    with CP/M 2.2G & 81-292-A ROM.

    Kaypro 2 Schematics:



      Yup; but it's identical as the same Kaypro pictured in the page, with full height drives, not half height. Usually this model comes with "Kaypro II" silkscreened; but this one has the unusual "Kaypro 2" legend.

      Until it arrives, the only clue about the ROM is the boot screen, definitely seems a custom ROM; but I haven't been able to find any info about it (basing my searches on the "Advanced Technology Systems S.A." message)


        I have seen them both - as "Kaypro II" and "Kaypro 2". I think the roman numerals are used more often, so i assume that is the older style...

        No idea bout Advanced Technology Systems... I found a logo that belonged to a company in Chile?


          Here's the machine (seller's photos) and the boot screen with that ATS message:

          In fact, I've just noticed that S.A. is the spanish acronim for "sociedad anónima" (anonymous society), something like "limited company". In french it's used the same, "Société Anonyme". That chilean company could be the one; but there're a lot of companies with that name, no one seems to be related with Kaypro tho.

          I'll dump the ROM and maybe comparing it with the available ones can shed some light.
          Last edited by jltursan; January 10, 2016, 08:31 AM.


            Any photo's of the back? It could be a 2x with an 84 board. I've seen machines like this with 'Kaypro 2' on the sides, later 84 boards and full height Tandon TM100-2A double sided drives.

            Another way to tell is the later machines have a higher resolution screen font, although I can't tell for sure from the photo above.

            Either way, Kaypro's are nice machines and that one looks in good condition



              Yep, here's the back:

              The Kaypro seems mostly in good shape; but the keyboard has the RJ connector damaged so I'll need to replace it (I'm not sure about the cable being the original one; so if I need to build a new one it can be tricky due the capacitance issues). No idea about the floppy drives; but as I have replacements I'm not really worried about them.

              I've been checking all the ROMs found in the web and none of them have that ATS string inside, seems that it's not preserved...


                Ahh, That looks like an 83 board. The 2/84 machines have the keyboard socket over to one side and have an extra RS232 interface. Drives are almost certainly single sided although I'm happy to be proven wrong

                Those keyboard connectors are a real pain. the plastic seems to be very brittle and easy to damage. You are right about the issues with the cable. The 2/84 boards are less picky about this and I've used normal phone handset cables with them without problem.



                  Well, it's finally here!. The board:

                  It's a 81-240A PCB, I've already dumped the ROM and it's an adapted 81-232, the code is really close, only new areas occupied by what it looks as extra charmaps. As the machine is a Greek model (not an imported one) it's an obvious adaptation.
                  There's also a Greek char ROM that needs to be dumped. It has a hack probably used to switch banks, 2732's A11 is wired to Z80 PIO's PB0, I need to check the schematics to figure out how the switching is achieved (keyboard pressing, OUT's?).

                  The keyboard was broken; but it was an easy to fix mechanical fault.

                  About booting it, it works fine, both drives. I've created at least two working CP/M 2.2F boot disks based on SSDD images found in Maslin's archive.

                  All in all, I'm very satisfied with the machine


                    A Kaypro II is not the same as a Kaypro 2. And, the Kaypro II came long before the Kaypro 1. So did the Kaypro 2.
                    Be polite and I may let you live.



                      Yep, basically this one is a Kaypro II (a classic 2.5Mhz model) with "Kaypro 2" silkscreened everywhere, it's not as fancy as the real Kaypro 2 models (2x,'84,etc.)


                        Very strange. But, at least you get a blue numeric keypad.

                        Now you just need a Synergy II to go with it.
                        Be polite and I may let you live.



                          Way cool the Synergy!, nice analog equipment when paired


                            Unfortunately, few and far between. Not to mention out of most of our price ranges!
                            Be polite and I may let you live.



                              Originally posted by jltursan View Post
                              The Kaypro seems mostly in good shape; but the keyboard has the RJ connector damaged so I'll need to replace it
                              I just finished repairing the one on my Kaypro. I tried searching for identical connectors on line with no success. I had to take a different approach to repairing it. I scrounged up an old telephone, took out the circuit board, removed the surrounding components, cut it out, drilled some holes, used some standoffs, and I've got a much better and more solid keyboard plug. I haven't tried it yet since I have yet to make some Kaypro system disks.

                              My blog on finding electronic treasure, audio oddities, and anything else I find interesting